Staying within a window
Author
What is the easiest way to limit a sprite from going off the screen in a window? I don't want to be able to go off the screen and get "lost" out of sight. Is there a way to easily do this within a 640 x 480 window?
Sure, just simply do collision to see if the sprite is about to move about of bounds:
if(!(spirte.pos_x >= (window_size.right - sprite.width)) {
// then the sprite is free to move
}[/cpde]
Author
Hey thanks......so far I have this:
if ( xpos >= LEVEL_WIDTH)
{
xpos = LEVEL_WIDTH - ship_WIDTH;
is that going in the right direction. I guess I'd just have put something in for the ypos next.
if ( xpos >= LEVEL_WIDTH)
{
xpos = LEVEL_WIDTH - ship_WIDTH;
is that going in the right direction. I guess I'd just have put something in for the ypos next.
I forgot to login for the last post sorry, but yea your headed in the right direction if that is what your meaning. Or if you mean by saying that, "LEVEL_WIDTH - ship_WIDTH", will move your sprite back in to bounds if it moves out of bounds yes it will. But what you want to do is have a sprite.temp_pos_x that will check to see if the new postion that the sprite is wanting to move to is legal. If the sprite.temp_pos_x is a legal move then set the sprite.pos_x equal to the sprite.temp_pos_x position. Also if you wanted, just to see another why of doing this:
if(!(xpos >= LEVEL_WIDTH){ // move the sprite with is speed in that direction}
Author
How about this. Does this look ok?
void CheckBounds() {if (xpos >= LEVEL_WIDTH){ {xpos = LEVEL_WIDTH - ship_WIDTH;} if (ypso >= LEVEL_HEIGHT) {ypos = LEVEL_HEIGHT - ship_HEIGHT;}}}
Author
I thought so too. I'm getting an error:
expected primary-expression before '=' token
Can't quite make that out at this time.
expected primary-expression before '=' token
Can't quite make that out at this time.
Author
The code piece is the same that I just posted above and it says the error occurs on this line:
if (xpos >= LEVEL_WIDTH)
if (xpos >= LEVEL_WIDTH)
I don't see any errors with that line of code unless the LEVEL_WIDTH isn't defined, but I'm 100% sure that you have defined it. I'm guessing that maybe the error isn't from that line because it say's, "before '=' token". Check around that line of code to make sure everything is right. Post the block of code, function that that line of code is in.
Ignore the last "edit"
Ignore the last "edit"
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